Here you can find the source of getValidityAsString(Date endDate)
public static final String getValidityAsString(Date endDate)
//package com.java2s; /**//from w w w . ja v a2 s . co m * Copyright (c) Istituto Nazionale di Fisica Nucleare, 2006-2014. * * Licensed under the Apache License, Version 2.0 (the "License"); * you may not use this file except in compliance with the License. * You may obtain a copy of the License at * * http://www.apache.org/licenses/LICENSE-2.0 * * Unless required by applicable law or agreed to in writing, software * distributed under the License is distributed on an "AS IS" BASIS, * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. * See the License for the specific language governing permissions and * limitations under the License. */ import java.util.Date; import java.util.concurrent.TimeUnit; public class Main { public static final String getValidityAsString(Date endDate) { final long timeDiff = getTimeLeft(endDate); return getFormattedTime(timeDiff); } public static final long getTimeLeft(Date end) { Date now = new Date(); final long expireTime = end.getTime(); final long currentTime = now.getTime(); long timeleft = (expireTime - currentTime); if (timeleft <= 0) timeleft = 0; return timeleft; } public static final String getFormattedTime(long timeleft) { String formattedTime = null; if (timeleft <= 0) formattedTime = String.format("%02d:%02d:%02d", 0, 0, 0); else { final long hours = TimeUnit.MILLISECONDS.toHours(timeleft); final long minutes = TimeUnit.MILLISECONDS.toMinutes(timeleft - TimeUnit.HOURS.toMillis(hours)); final long seconds = TimeUnit.MILLISECONDS .toSeconds(timeleft - TimeUnit.HOURS.toMillis(hours) - TimeUnit.MINUTES.toMillis(minutes)); formattedTime = String.format("%02d:%02d:%02d", hours, minutes, seconds); } return formattedTime; } }